PALM SPRINGS, Calif. (KTVU) - There's been a collective "awww" from the internet after Serena Williams' husband posted a series of adorable billboards he put up to celebrate his wife's return to the court since giving birth last September.

Williams' husband, Reddit co-founder Alexis Ohanian Sr. had four billboards go up along Interstate 10 into Palm Springs, the route Williams is expected to take to Indian Wells for the BNP Paribas Open set get underway next Monday.

In a Tweet this morning, Ohanian wrote, "... @OlympiaOhanian & I wanted to welcome her back to tennis. Designed them myself, with some help from Jr."

The post is hashtagged #GMOAT for "Greatest Momma of All Time."

Each billboard features a photo of the couple's 5-month-old daughter Alexis.

The final photo in the series shows the new mom holding her baby close to her face and the caption: "Serena Williams G.M.O.A.T." And it's signed -Alexis Jr + Sr.

On social media, many of Ohanian's followers said the gesture moved them to tears. Others praised him for the romantic display and his ingenuity.

Twitter user @likethemovie19 commented, "I honestly do not have words for you, @alexisohanian - that is one of the sweetest gestures I’ve ever seen and I’m SO happy you guys are together."

"Best husband of all time?" wrote @CopeMay.

"WOW you think of everything. Putting the other husbands to shame," commented @upc8msq.

And from Ohanian's own wife was this response: “Literally am crying. This is so sweet. I love you.“

Williams' actual first return to tennis since becoming a mom came earlier this month at the Fed Cup in North Carolina when she played in a doubles match with her sister Venus.

The upcoming B.N.P. Paribas Open is set to be Serena Williams' first official singles tournament since giving birth.

The 36-year-old tennis champ has recently opened up about the complications she faced during her delivery and the postpartum health issues that followed.

In an article she penned for a CNN article last week, she wrote that she almost died giving birth and detailed some of the life threatening complications in the aftermath, including a pulmonary embolism that led to several surgeries.

Williams and Ohanian married last November.

Ohanian recently stepped down from daily duties at San Francisco-based Reddit to focus on a full-time role at Initialized Capital, the San Francisco venture capital firm that he also co-founded.